On 2012-08-21T13:16:29, David Lang <[email protected]> wrote:
> with ldirectord you have an extra network hop, and you have all your
> traffic going through one system. This is a scalability bottleneck as
> well as bing a separate system to configure.
>
> CLUSTERIP isn't the solution to every problem, but it works really
> well for many problems.
To complete the list of issues though is that with clusterip, every
participating node sees all inbound traffic, and discards everything but
its own (CPU load).
There's always a trade-off with everything.
> It's especially good as a simple migration from active/passive. You
> just add a third box to the cluster and change the configuration so
> that instead of your VIP moving from one box to another, it's instead
> shared between the systems. This is a much smaller step than setting
> up an external load balancer system.
I'm not quite sure what you need the 3rd box for? Of course, an odd
number of nodes is always a good idea, but not required by clusterip.
Regards,
Lars
--
Architect Storage/HA
SUSE LINUX Products GmbH, GF: Jeff Hawn, Jennifer Guild, Felix Imendörffer, HRB
21284 (AG Nürnberg)
"Experience is the name everyone gives to their mistakes." -- Oscar Wilde
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